Wells Company is in the business of producing stuffing for pillows. At the end of its joint process, it has the following products available: (1) primary stuffing for pillows, (2) primary stuffing for comforters, and (3) pieces of stuffing that didn't pass inspection.

What name(s) could you give the first two products, and what name(s) could you give to the product (3)? Describe the basic difference among these types of products.